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Application of Duffing Oscillators for Passive Islanding Detection of Inverter-Based Distributed Generation Units

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3 Author(s)
Vahedi, H. ; Electr. Eng. Dept., Amirkabir Univ. of Technol., Tehran, Iran ; Gharehpetian, G.B. ; Karrari, M.

Regarding the safety and reliable operation of modern distributed generation (DG) systems, an expert diagnosis apparatus is required to distinguish between different events. One of the crucial requirements in DG safe operation is the “islanding detection.” In this paper, a new passive islanding detection method, based on the application of the Duffing oscillators, is suggested for the first time and tested under different network conditions. The method is designed to detect the changes on point of common coupling frequency by identifying the transformation of the Duffing oscillator from “chaotic state” to “great periodic state” and vice-versa. The simulations results, carried out by MATLAB/Simulink, are used to validate the performance of the proposed method. It is shown that the proposed method has excellent accuracy within a minimum detection time, even with the presence of high noise to signal ratios.

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Power Delivery, IEEE Transactions on  (Volume:27 ,  Issue: 4 )